A couple of friends and I were in Yellowstone Park on our way to fish the Yellowstone at the buffalo ford. Traffic came to a complete stop. Cars were lined up as far forward and back as I could see. To our left was the river. To our right was a high rocky bluff. I noticed there was no traffic in the oncoming lane, and I assumed every thing was stopped while someone was looking at wildlife. Suddenly a guy comes bicycling down the oncoming lane going as fast as he could and looking over his shoulder. Twenty yards behind him about 15 or 20 buffalo are coming as fast as they could down the oncoming lane. They were trapped between the bluff and the traffic with no way out except right down the road. I hope the guy out ran them. Silvercreek